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mathmatics a leveal

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It is a probability frequency distribution for a random variable that theoretically takes on a bell shape symmetrical about the mean as follows.

bellcurve.gif
 
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a particle with constant accerleration along a straight line passing through points A,B and C with speed 2ms^-1 , 5ms^-1 and 8 ms^-1 respectively show that the ratio between the distances AB and BC is 7:13
 
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